US20210152098A1 - Power conversion device - Google Patents
Power conversion device Download PDFInfo
- Publication number
- US20210152098A1 US20210152098A1 US17/026,410 US202017026410A US2021152098A1 US 20210152098 A1 US20210152098 A1 US 20210152098A1 US 202017026410 A US202017026410 A US 202017026410A US 2021152098 A1 US2021152098 A1 US 2021152098A1
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- United States
- Prior art keywords
- power conversion
- conversion device
- casing
- casing lid
- shaft seal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
- H05K7/1427—Housings
- H05K7/1432—Housings specially adapted for power drive units or power converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
-
- H05K5/0239—
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/06—Hermetically-sealed casings
- H05K5/061—Hermetically-sealed casings sealed by a gasket held between a removable cover and a body, e.g. O-ring, packing
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/06—Hermetically-sealed casings
- H05K5/069—Other details of the casing, e.g. wall structure, passage for a connector, a cable, a shaft
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/03—Covers
Definitions
- the present disclosure relates to a power conversion device.
- a plurality of power conversion devices are mounted to electric vehicles using a motor as a drive source, such as electric automobiles and hybrid automobiles.
- the power conversion devices include: a commercially-available charger for converting AC power into DC power and charging a high-voltage battery; a DC/DC converter for converting DC power of the high-voltage battery into voltage (for example, 12V) for an auxiliary device battery; an inverter for converting DC power from the battery into AC power for the motor; and the like.
- a plurality of terminals are disposed as to-be-connected portions for receiving power supplied from an outside and for outputting AC current to the outside.
- the terminals are, for example, a current outputting terminal and a motor control signal connector.
- a structure for fastening the terminal by means of bolts from outside the casing and a structure for fitting the connector are provided in the casing.
- the casing has: an opening through which a bolt fastening tool is inserted into the casing and work is performed; and an opening through which work for fitting the connector is performed.
- waterproof casing lids for covering the openings are attached to the casing after the bolts are fastened and the connector is fitted.
- Patent Document 1 Japanese Laid-Open Patent Publication No. 2011-166981
- Patent Document 1 since the plurality of openings are in communication with one another so as to be formed as one opening portion, the openings can be covered to achieve waterproofness by attaching the one casing lid, whereby workability is improved.
- the plurality of openings since the plurality of openings are in communication with one another, the shape of a seal for achieving waterproofness is complicated, and thus a surface seal needs to be used as a waterproof seal structure.
- the surface seal structure is employed for the openings in communication with one another, the following problem arises.
- the surface area of the casing is increased for providing the surface seal, and thus the layout of the internal structure of the power conversion device is restricted, and the casing and also the power conversion device is upsized.
- the surface seal structure is employed, the following problem also arises.
- the casing lid When the casing lid is attached to the casing, the casing lid cannot be retained by the surface seal, and thus the casing lid has to be supported at the time of fastening bolts for attaching the casing lid to the casing, and furthermore, the number of bolts to be fastened is increased for ensuring sealability, whereby workability of attaching the casing lid becomes poor.
- the present disclosure has been made to solve the aforementioned problems, and an object of the present disclosure is to obtain a power conversion device that has improved assembling workability and that realizes downsizing thereof.
- a power conversion device includes: an electrical component; a casing enclosing the electrical component and terminals connected to the electrical component and an outside, the casing having a plurality of opening portions in which the terminals are disposed; and a casing lid covering the opening portions.
- a shaft seal provided so as to be in contact with a side surface contiguous with a rim of an opening portion among the opening portions, and a surface seal provided so as to be in contact with a surface contiguous with a rim of an opening portion among the opening portions, are disposed so as to be in contact with the casing lid.
- the different seals are in contact with the one casing lid, and thus the power conversion device has improved assembling workability and can realize downsizing thereof.
- FIG. 1 is a perspective view of the outer appearance of a power conversion device according to a first embodiment
- FIG. 2 is an enlarged perspective view of opening portions of the power conversion device according to the first embodiment
- FIG. 3 is a perspective view of the outer appearance of a casing lid of the power conversion device according to the first embodiment
- FIG. 4 is another perspective view of the outer appearance of the casing lid of the power conversion device according to the first embodiment
- FIG. 5 is a perspective view of the outer appearance of a shaft seal of the power conversion device according to the first embodiment
- FIG. 6 is a perspective view of the outer appearance of a surface seal of the power conversion device according to the first embodiment
- FIG. 7 is a sectional view taken along the alternate long and short dash line A-A in FIG. 1 ;
- FIG. 8 is a perspective view of the outer appearance of a casing lid of a power conversion device according to a second embodiment
- FIG. 9 is a perspective view of the outer appearance of a casing lid of a power conversion device according to a third embodiment.
- FIG. 10 is a plan view of the outer appearance of a part of the casing lid of the power conversion device according to the third embodiment.
- FIG. 11 is a perspective view of the outer appearance of a shaft seal of the power conversion device according to the third embodiment.
- FIG. 1 is a perspective view of the outer appearance of a power conversion device 100 according to a first embodiment.
- FIG. 2 is an enlarged perspective view of opening portions 7 , with a casing lid 1 being removed from the power conversion device 100 .
- FIG. 3 is a perspective view of the outer appearance of the casing lid 1 of the power conversion device 100 .
- FIG. 4 is another perspective view of the outer appearance of the casing lid 1 , as seen from the back side of FIG. 3 .
- FIG. 5 is a perspective view of the outer appearance of a shaft seal 3 .
- FIG. 6 is a perspective view of the outer appearance of a surface seal 4 .
- FIG. 7 is a sectional view taken along the alternate long and short dash line A-A in FIG. 1 before screws 5 are fastened.
- the power conversion device 100 is a device for converting power, which has been supplied from a power supply, into a predetermined AC voltage and supplying the AC voltage to a load.
- the load is, for example, a motor.
- the power conversion device 100 includes an electrical component (not shown), a casing 2 , and the casing lid 1 .
- the casing lid 1 shown in FIG. 3 is attached to the casing 2 by means of four screws 5 as shown in FIG. 1 .
- the casing 2 encloses the electrical component and terminals connected to the electrical component and an outside. As shown in FIG. 2 , the casing 2 has two opening portions 7 in which the terminals are disposed.
- the opening portions 7 are a shaft seal opening portion 7 a and a surface seal opening portion 7 b .
- an AC load terminal 2 a is provided as a terminal to be connected to the outside.
- the shaft seal opening portion 7 a is an opening portion for performing connection work when connecting the AC load terminal 2 a and the outside to each other.
- the AC load terminal 2 a is in communication with the outside.
- a signal wire female connector 10 is provided as a terminal to be connected to the outside.
- the surface seal opening portion 7 b is an opening portion for performing connection work when connecting the signal wire female connector 10 and the outside to each other.
- the signal wire female connector 10 is in communication with the outside. Before the connection work, the signal wire female connector 10 is retained by a signal wire female connector retaining portion 11 .
- the signal wire female connector 10 is moved in a direction toward the back side of the casing 2 , and the signal wire female connector 10 is connected to the outside. After the connection work, the signal wire female connector 10 is detached from the signal wire female connector retaining portion 11 .
- the shaft seal 3 shown in FIG. 5 is provided so as to be in contact with a side surface 7 c contiguous with the rim of the shaft seal opening portion 7 a .
- the surface seal 4 shown in FIG. 6 is provided so as to be in contact with a surface seal mounting surface 7 d which is a surface contiguous with the rim of the surface seal opening portion 7 b .
- the shaft seal 3 and the surface seal 4 are attached to a side of the casing lid 1 on which the opening portions 7 are covered.
- the shaft seal 3 and the surface seal 4 are disposed so as to be in contact with the casing lid 1 .
- the two opening portions 7 are covered by the casing lid 1 after the connection work using each opening portion 7 .
- the terminals provided in the opening portions 7 are not limited to the AC load terminal 2 a and the signal wire female connector 10 , and may be each, for example, a DC load terminal or a terminal to be connected to another load.
- the casing lid 1 which is a major part of the present disclosure will be described.
- the casing lid 1 is formed by, for example, resin molding.
- the casing lid 1 includes the shaft seal 3 , the surface seal 4 , the screws 5 , bushes 6 , and an interlock connector 8 .
- the casing lid 1 includes the two different types of seals.
- the shaft seal 3 is provided so as to be fitted to a projecting shaft seal mounting portion 1 a
- the surface seal 4 is provided so as to be fitted to a recessed surface seal mounting portion 1 b .
- the casing lid 1 covers the shaft seal opening portion 7 a via the shaft seal 3 , to achieve waterproofness.
- the casing lid 1 covers the surface seal opening portion 7 b via the surface seal 4 , to achieve waterproofness.
- the shaft seal 3 is, in a plan view, formed into a laterally elongated rectangle having round corners, and is, at a side surface 3 a thereof, in contact with the side surface 7 c of the shaft seal opening portion 7 a .
- the surface seal 4 is, in a plan view, formed into a pentagon so as to be fitted along the outer shape of the surface seal opening portion 7 b , and is, at a flat surface 4 a thereof, in contact with the surface seal mounting surface 7 d surrounding the surface seal opening portion 7 b .
- the shaft seal 3 and the surface seal 4 are made of, for example, nitrile rubber.
- the surface seal 4 is provided as a seal structure.
- the shaft seal 3 can be used as a seal structure. In the case where the shaft seal 3 is used, no surface surrounding the opening portion such as the surface seal mounting surface 7 d is needed, and the size of the seal structure can be reduced, whereby the casing 2 and also the power conversion device 100 can be downsized.
- the shaft seal 3 is fitted to the shaft seal opening portion 7 a first, whereby the position of the casing lid 1 is uniquely determined relative to the casing 2 , and the casing lid 1 can be temporarily fixed. Therefore, the casing lid 1 can be fixed to the casing 2 by means of the screw 5 without supporting the casing lid 1 with a hand. Since the one casing lid 1 includes the two different types of seals, workability is improved, and the time for assembling work can be shortened.
- each bush 6 is composed of: a hole 6 a through which the corresponding screw 5 is inserted; a level portion 6 b surrounding the hole 6 a; and a side surface portion 6 c surrounding the outer periphery of the level portion 6 b.
- the screws 5 for attaching the casing lid 1 to the casing 2 are disposed only around the surface seal 4 . The screws 5 are thus arranged since a surface pressure for pressing the surface seal 4 against the surface seal mounting surface 7 d needs to be applied to the surface seal 4 .
- each screw 5 is, at a non-rolled portion 5 b thereof between a rolled portion 5 a of the screw 5 and a head portion 5 c of the screw 5 , retained in the hole 6 a of the corresponding bush 6 .
- the diameter of the hole 6 a is larger than the outer diameter of the non-rolled portion 5 b of the screw 5 but smaller than the outer diameter of each of the rolled portion 5 a and the head portion 5 c . Therefore, the casing lid 1 can retain the screw 5 without the screw 5 falling off from the bush 6 .
- the bush 6 is formed of, for example, an aluminum alloy having a lower hardness than the screw 5 formed of iron. Therefore, the rolled portion 5 a of the screw 5 can be screwed so as to be inserted through the bush 6 while tapping the bush 6 . Accordingly, the bush 6 can be held between the rolled portion 5 a and the head portion 5 c , of the screw, which each have an outer diameter larger than the diameter of the hole 6 a.
- the casing 2 is provided with internal thread portions 2 b in each of which the corresponding screw 5 is fastened.
- the casing 2 is, at a portion thereof contiguous with each internal thread portion 2 b, provided with a counterbore 2 c to which the rolled portion 5 a is fitted.
- the rolled portion 5 a of the screw 5 is formed such that the length thereof is smaller than the total of the height of the side surface portion 6 c of the bush 6 and the depth of the counterbore 2 c. Therefore, the casing lid 1 can be temporarily fixed to the casing 2 without the casing lid 1 being tilted relative to the casing 2 , before the screw 5 and the internal thread portion 2 b are fastened to each other. Accordingly, the screw 5 can be fastened without supporting the casing lid 1 with a hand in a state where the screw 5 is retained. Thus, workability is improved, and the time for assembling work can be shortened.
- the casing lid 1 includes the interlock connector 8 to be engaged with an interlock female connector 9 (shown in FIG. 2 ) provided in the surface seal opening portion 7 b .
- the interlock connector 8 includes terminals 8 b provided in the interlock connector 8 , and a housing portion 8 a enclosing the terminals 8 b.
- the housing portion 8 a is formed by resin molding so as to be integrated with the casing lid 1 .
- the terminals 8 b are insert-molded into the casing lid 1 . Presence or absence of the casing lid 1 can be determined by detecting connection between the terminals 8 b and terminals provided to the interlock female connector 9 .
- the configuration of the interlock connector 8 is not limited to this configuration.
- a separately formed interlock connector 8 may be engaged with a nut that is insert-molded into the casing lid 1 .
- the casing lid 1 Since the casing lid 1 is formed by resin molding, the weight of the casing lid 1 can be reduced.
- the method for forming the casing lid 1 is not limited to resin molding.
- the casing lid 1 may be formed by metal sheet press working or aluminum die-casting. If the casing lid 1 is formed by metal sheet press working, the casing lid 1 can be formed at low cost.
- the shape of each bush 6 can be simultaneously formed on the casing lid 1 during metal sheet press working, and thus the number of components can be reduced. Meanwhile, if the casing lid 1 is formed by aluminum die-casting, the strength of the material can be increased, and the weight of the casing lid 1 can be reduced.
- the shape of the bush 6 can be simultaneously formed on the casing lid 1 during aluminum die-casting, and thus the number of components can be reduced.
- each bush 6 is formed by metal sheet deep drawing, a structure for retaining the screw 5 can be easily formed at low cost.
- the method for forming the bush 6 is not limited to metal sheet deep drawing.
- the bush 6 may be formed by machining or forging. If the bush 6 is formed by machining, a material that cannot be formed by metal sheet deep drawing can be used for the bush 6 . Accordingly, the degree of freedom in materials that can be selected is increased, thereby enabling increase in the strength of the material, weight reduction, or the like. Meanwhile, if the bush 6 is formed by forging, the bush 6 can be formed at low cost.
- the bush 6 Since the bush 6 is made of an aluminum alloy, the bush 6 has high corrosion resistance and does not need to be plated, and the weight thereof can be reduced.
- the raw material of the bush 6 is not limited to aluminum alloy. The raw material of the bush 6 only has to have a hardness lower than the hardness of the screw 5 .
- the seals respectively provided along the peripheries of the plurality of opening portions 7 of the casing 2 are the shaft seal 3 and the surface seal 4 which are in contact with the casing lid 1 covering the opening portions 7 .
- the different seals are in contact with the one casing lid 1 , workability of assembling the power conversion device 100 is improved, and downsizing of the power conversion device 100 can be realized.
- the connection work for the AC load terminal 2 a which is a high-current terminal is performed by fastening screws with use of a tool.
- the shape of the opening portion can be simplified, and the shaft seal 3 can be used as a seal for the opening portion.
- the screw 5 in the case where each screw 5 for attaching the casing lid 1 to the casing 2 is retained by the corresponding bush 6 at the non-rolled portion 5 b between the rolled portion 5 a of the screw 5 and the head portion 5 c of the screw 5 , the screw 5 can be retained by the casing lid 1 while the screw 5 is prevented from falling off from the bush 6 .
- the screw 5 since the screw 5 is retained by the casing lid 1 , the work of screwing the screw 5 into the corresponding internal thread portion 2 b through the casing lid 1 is not needed, and the workability of assembling the power conversion device 100 can be improved.
- the screws 5 are arranged around the surface seal 4 , no screws 5 are needed around the shaft seal 3 , and thus downsizing of the power conversion device 100 can be realized.
- the counterbore 2 c to which the rolled portion 5 a is fitted is provided at the portion contiguous with the internal thread portion 2 b, the casing lid 1 can be temporarily fixed to the casing 2 without the casing lid 1 being tilted relative to the casing 2 , before the screw 5 and the internal thread portion 2 b are fastened to each other.
- the screw 5 can be fastened without supporting the casing lid 1 with a hand in a state where the screw 5 is retained.
- the workability of assembling the power conversion device 100 is improved, and the time for the assembling work can be shortened.
- the casing lid 1 includes the interlock connector 8 to be engaged with the interlock female connector 9 provided in the surface seal opening portion 7 b , presence or absence of the casing lid 1 to be provided to the power conversion device 100 can be easily determined.
- the housing portion 8 a of the interlock connector 8 is formed by resin molding so as to be integrated with the casing lid 1 , the number of components can be reduced, and the workability of assembling the power conversion device 100 is improved.
- the terminals 8 b of the interlock connector 8 are insert-molded into the casing lid 1 , the workability of assembling the power conversion device 100 is improved, and the time for the assembling work can be shortened.
- FIG. 8 is a perspective view of the outer appearance of a casing lid 1 , as seen from the back side of FIG. 3 .
- the power conversion device 100 according to the second embodiment has a configuration in which a projection 12 is provided in addition to the components of the casing lid 1 of the power conversion device 100 described in the first embodiment.
- the casing lid 1 includes the projection 12 located, on the side of the casing lid 1 on which the opening portions 7 are covered, between the casing lid 1 and the signal wire female connector 10 which is the terminal on the surface seal opening portion 7 b side on which the surface seal 4 is provided.
- the projection 12 is formed by resin molding so as to be integrated with the casing lid 1 .
- the position of the projection 12 corresponds to the position of the signal wire female connector 10 which is to be detached from the signal wire female connector retaining portion 11 in connection work to the outside, and which has not yet been connected to the outside but is retained by the signal wire female connector retaining portion 11 .
- the casing 2 includes the signal wire female connector 10 retained by the signal wire female connector retaining portion 11 on the surface seal opening portion 7 b side before the connection work.
- FIG. 2 shows the inside of the surface seal opening portion 7 b before the connection work, and the signal wire female connector 10 is retained by the signal wire female connector retaining portion 11 . If the work of attaching the casing lid 1 is performed in a state where the connection work has not been performed, the projection 12 and the signal wire female connector 10 interfere with each other, and thus the casing lid 1 cannot be attached to the casing 2 . Whether the connection work between the signal wire female connector 10 and the outside has been completed can be determined based on the interference between the projection 12 and the signal wire female connector 10 .
- the casing lid 1 includes the projection 12 at the position, on the side where the opening portions 7 are covered, that corresponds to the position of the signal wire female connector 10 which has not yet been connected to the outside. Accordingly, whether the connection work between the signal wire female connector 10 and the outside has been completed can be determined based on the interference between the projection 12 and the signal wire female connector 10 . Therefore, the connection work can be prevented from being forgotten to be performed.
- FIG. 9 is a perspective view of the outer appearance of a casing lid 1 , as seen from the back side of FIG. 3 .
- FIG. 10 is a plan view of the outer appearance of a part of the casing lid 1 from which a shaft seal 3 of the power conversion device 100 has been removed.
- FIG. 11 is a perspective view of the outer appearance of the shaft seal 3 of the power conversion device 100 .
- the power conversion device 100 according to the third embodiment has a configuration in which protrusions 3 b are provided to the shaft seal 3 in addition to the components of the casing lid 1 of the power conversion device 100 described in the second embodiment.
- the shaft seal 3 includes the protrusions 3 b to be fitted to shaft seal retaining holes 1 e which are holes formed in the shaft seal mounting portion 1 a of the casing lid 1 .
- the shaft seal 3 includes four protrusions 3 b on a flat surface 3 c thereof that faces the casing lid 1 when the shaft seal 3 and the shaft seal mounting portion 1 a are fitted to each other.
- the number of protrusions 3 b is not limited thereto. For example, the number of protrusions 3 b may be increased.
- the protrusions 3 b are integrated with the shaft seal 3 when the shaft seal 3 is formed.
- the shaft seal retaining holes 1 e are formed in the base of the shaft seal mounting portion 1 a .
- the shaft seal retaining holes 1 e are integrally formed in the casing lid 1 when the casing lid 1 is formed. As shown in FIG. 9 , the shaft seal 3 is attached to the shaft seal mounting portion la by fitting the protrusions 3 b and the shaft seal retaining holes 1 e to each other. If the shaft seal retaining holes 1 e and the protrusions 3 b are fitted to each other in a lightly press-fitted state, the shaft seal 3 can be left on the casing lid 1 side when the casing lid 1 is attached to or detached from the casing 2 .
- the shaft seal 3 includes the protrusions 3 b to be fitted to the shaft seal retaining holes 1 e formed in the casing lid 1 . Accordingly, the workability of assembling the power conversion device 100 is improved, and the time for the assembling work can be shortened.
Abstract
Description
- The present disclosure relates to a power conversion device.
- A plurality of power conversion devices are mounted to electric vehicles using a motor as a drive source, such as electric automobiles and hybrid automobiles. Examples of the power conversion devices include: a commercially-available charger for converting AC power into DC power and charging a high-voltage battery; a DC/DC converter for converting DC power of the high-voltage battery into voltage (for example, 12V) for an auxiliary device battery; an inverter for converting DC power from the battery into AC power for the motor; and the like.
- In a casing of each power conversion device, a plurality of terminals are disposed as to-be-connected portions for receiving power supplied from an outside and for outputting AC current to the outside. The terminals are, for example, a current outputting terminal and a motor control signal connector. As structures for connecting a motor terminal and a signal connector to these terminals, a structure for fastening the terminal by means of bolts from outside the casing and a structure for fitting the connector are provided in the casing. The casing has: an opening through which a bolt fastening tool is inserted into the casing and work is performed; and an opening through which work for fitting the connector is performed. In order to prevent water, dust, and the like from entering the casing from these openings, waterproof casing lids for covering the openings are attached to the casing after the bolts are fastened and the connector is fitted.
- In recent years, the structures of in-vehicle inverters have been complicated. Thus, power conversion devices have structures in which a plurality of openings are formed in casings thereof. Therefore, a waterproof casing lid needs to be attached for each of the plurality of formed openings. In order to improve workability of attaching the casing lids, casing lids capable of being easily attached for the plurality of openings have been required. As a measure to easily close a plurality of openings, a structure has been disclosed in which a plurality of openings are in communication with one another so as to be formed as one opening portion, and one casing lid is attached for the openings in communication with one another, thereby achieving waterproofness (see, for example, Patent Document 1).
- Patent Document 1: Japanese Laid-Open Patent Publication No. 2011-166981
- In the above-described
Patent Document 1, since the plurality of openings are in communication with one another so as to be formed as one opening portion, the openings can be covered to achieve waterproofness by attaching the one casing lid, whereby workability is improved. However, since the plurality of openings are in communication with one another, the shape of a seal for achieving waterproofness is complicated, and thus a surface seal needs to be used as a waterproof seal structure. - If the surface seal structure is employed for the openings in communication with one another, the following problem arises. The surface area of the casing is increased for providing the surface seal, and thus the layout of the internal structure of the power conversion device is restricted, and the casing and also the power conversion device is upsized. In addition, if the surface seal structure is employed, the following problem also arises. When the casing lid is attached to the casing, the casing lid cannot be retained by the surface seal, and thus the casing lid has to be supported at the time of fastening bolts for attaching the casing lid to the casing, and furthermore, the number of bolts to be fastened is increased for ensuring sealability, whereby workability of attaching the casing lid becomes poor.
- The present disclosure has been made to solve the aforementioned problems, and an object of the present disclosure is to obtain a power conversion device that has improved assembling workability and that realizes downsizing thereof.
- A power conversion device according to the present disclosure includes: an electrical component; a casing enclosing the electrical component and terminals connected to the electrical component and an outside, the casing having a plurality of opening portions in which the terminals are disposed; and a casing lid covering the opening portions. A shaft seal provided so as to be in contact with a side surface contiguous with a rim of an opening portion among the opening portions, and a surface seal provided so as to be in contact with a surface contiguous with a rim of an opening portion among the opening portions, are disposed so as to be in contact with the casing lid.
- In the power conversion device according to the present disclosure, the different seals are in contact with the one casing lid, and thus the power conversion device has improved assembling workability and can realize downsizing thereof.
-
FIG. 1 is a perspective view of the outer appearance of a power conversion device according to a first embodiment; -
FIG. 2 is an enlarged perspective view of opening portions of the power conversion device according to the first embodiment; -
FIG. 3 is a perspective view of the outer appearance of a casing lid of the power conversion device according to the first embodiment; -
FIG. 4 is another perspective view of the outer appearance of the casing lid of the power conversion device according to the first embodiment; -
FIG. 5 is a perspective view of the outer appearance of a shaft seal of the power conversion device according to the first embodiment; -
FIG. 6 is a perspective view of the outer appearance of a surface seal of the power conversion device according to the first embodiment; -
FIG. 7 is a sectional view taken along the alternate long and short dash line A-A inFIG. 1 ; -
FIG. 8 is a perspective view of the outer appearance of a casing lid of a power conversion device according to a second embodiment; -
FIG. 9 is a perspective view of the outer appearance of a casing lid of a power conversion device according to a third embodiment; -
FIG. 10 is a plan view of the outer appearance of a part of the casing lid of the power conversion device according to the third embodiment; and -
FIG. 11 is a perspective view of the outer appearance of a shaft seal of the power conversion device according to the third embodiment. - Hereinafter, power conversion devices according to embodiments of the present disclosure will be described with reference to the drawings. In the description, identical and corresponding members and portions in the drawings will be denoted by the same reference characters.
-
FIG. 1 is a perspective view of the outer appearance of apower conversion device 100 according to a first embodiment.FIG. 2 is an enlarged perspective view ofopening portions 7, with acasing lid 1 being removed from thepower conversion device 100.FIG. 3 is a perspective view of the outer appearance of thecasing lid 1 of thepower conversion device 100.FIG. 4 is another perspective view of the outer appearance of thecasing lid 1, as seen from the back side ofFIG. 3 .FIG. 5 is a perspective view of the outer appearance of ashaft seal 3.FIG. 6 is a perspective view of the outer appearance of asurface seal 4.FIG. 7 is a sectional view taken along the alternate long and short dash line A-A inFIG. 1 beforescrews 5 are fastened. Thepower conversion device 100 is a device for converting power, which has been supplied from a power supply, into a predetermined AC voltage and supplying the AC voltage to a load. The load is, for example, a motor. Thepower conversion device 100 includes an electrical component (not shown), acasing 2, and thecasing lid 1. Thecasing lid 1 shown inFIG. 3 is attached to thecasing 2 by means of fourscrews 5 as shown inFIG. 1 . - The
casing 2 encloses the electrical component and terminals connected to the electrical component and an outside. As shown inFIG. 2 , thecasing 2 has twoopening portions 7 in which the terminals are disposed. Theopening portions 7 are a shaftseal opening portion 7 a and a surfaceseal opening portion 7 b. On the shaftseal opening portion 7 a side, anAC load terminal 2 a is provided as a terminal to be connected to the outside. The shaftseal opening portion 7 a is an opening portion for performing connection work when connecting theAC load terminal 2 a and the outside to each other. On the back side of thecasing 2, theAC load terminal 2 a is in communication with the outside. On the surfaceseal opening portion 7 b side, a signal wirefemale connector 10 is provided as a terminal to be connected to the outside. The surfaceseal opening portion 7 b is an opening portion for performing connection work when connecting the signal wirefemale connector 10 and the outside to each other. On the back side of thecasing 2, the signal wirefemale connector 10 is in communication with the outside. Before the connection work, the signal wirefemale connector 10 is retained by a signal wire femaleconnector retaining portion 11. During the connection work, the signal wirefemale connector 10 is moved in a direction toward the back side of thecasing 2, and the signal wirefemale connector 10 is connected to the outside. After the connection work, the signal wirefemale connector 10 is detached from the signal wire femaleconnector retaining portion 11.FIG. 2 shows the inside of the surfaceseal opening portion 7 b before the connection work, and the signal wirefemale connector 10 is retained by the signal wire femaleconnector retaining portion 11. Theshaft seal 3 shown inFIG. 5 is provided so as to be in contact with aside surface 7 c contiguous with the rim of the shaftseal opening portion 7 a. Thesurface seal 4 shown inFIG. 6 is provided so as to be in contact with a surfaceseal mounting surface 7 d which is a surface contiguous with the rim of the surfaceseal opening portion 7 b. As shown inFIG. 4 , theshaft seal 3 and thesurface seal 4 are attached to a side of thecasing lid 1 on which theopening portions 7 are covered. In thepower conversion device 100, theshaft seal 3 and thesurface seal 4 are disposed so as to be in contact with thecasing lid 1. As shown inFIG. 1 , the two openingportions 7 are covered by thecasing lid 1 after the connection work using eachopening portion 7. The terminals provided in the openingportions 7 are not limited to theAC load terminal 2 a and the signal wirefemale connector 10, and may be each, for example, a DC load terminal or a terminal to be connected to another load. - The
casing lid 1 which is a major part of the present disclosure will be described. Thecasing lid 1 is formed by, for example, resin molding. As shown inFIG. 4 , thecasing lid 1 includes theshaft seal 3, thesurface seal 4, thescrews 5,bushes 6, and aninterlock connector 8. Thecasing lid 1 includes the two different types of seals. Theshaft seal 3 is provided so as to be fitted to a projecting shaft seal mounting portion 1 a, and thesurface seal 4 is provided so as to be fitted to a recessed surfaceseal mounting portion 1 b. Thecasing lid 1 covers the shaftseal opening portion 7 a via theshaft seal 3, to achieve waterproofness. Thecasing lid 1 covers the surfaceseal opening portion 7 b via thesurface seal 4, to achieve waterproofness. As shown inFIG. 5 , theshaft seal 3 is, in a plan view, formed into a laterally elongated rectangle having round corners, and is, at aside surface 3 a thereof, in contact with theside surface 7 c of the shaftseal opening portion 7 a. As shown inFIG. 6 , thesurface seal 4 is, in a plan view, formed into a pentagon so as to be fitted along the outer shape of the surfaceseal opening portion 7 b , and is, at aflat surface 4 a thereof, in contact with the surfaceseal mounting surface 7 d surrounding the surfaceseal opening portion 7 b. Theshaft seal 3 and thesurface seal 4 are made of, for example, nitrile rubber. - In the case of an opening portion having a complicated outer shape such as the surface
seal opening portion 7 b , thesurface seal 4 is provided as a seal structure. Meanwhile, in the case of an opening portion having an uncomplicated outer shape such as the shaftseal opening portion 7 a, theshaft seal 3 can be used as a seal structure. In the case where theshaft seal 3 is used, no surface surrounding the opening portion such as the surfaceseal mounting surface 7 d is needed, and the size of the seal structure can be reduced, whereby thecasing 2 and also thepower conversion device 100 can be downsized. In addition, when thecasing lid 1 is attached to thecasing 2, theshaft seal 3 is fitted to the shaftseal opening portion 7 a first, whereby the position of thecasing lid 1 is uniquely determined relative to thecasing 2, and thecasing lid 1 can be temporarily fixed. Therefore, thecasing lid 1 can be fixed to thecasing 2 by means of thescrew 5 without supporting thecasing lid 1 with a hand. Since the onecasing lid 1 includes the two different types of seals, workability is improved, and the time for assembling work can be shortened. - The
metallic bushes 6 each made by, for example, metal sheet deep drawing are integrated with bushinsert molding portions 1 c of thecasing lid 1. As shown inFIG. 7 , eachbush 6 is composed of: a hole 6 a through which thecorresponding screw 5 is inserted; a level portion 6 b surrounding the hole 6 a; and aside surface portion 6 c surrounding the outer periphery of the level portion 6 b. Thescrews 5 for attaching thecasing lid 1 to thecasing 2 are disposed only around thesurface seal 4. Thescrews 5 are thus arranged since a surface pressure for pressing thesurface seal 4 against the surfaceseal mounting surface 7 d needs to be applied to thesurface seal 4. Noscrews 5 need to be arranged around theshaft seal 3 since theshaft seal 3 is provided so as to be fitted to theside surface 7 c of the shaftseal opening portion 7 a. As shown inFIG. 7 , eachscrew 5 is, at a non-rolled portion 5 b thereof between arolled portion 5 a of thescrew 5 and ahead portion 5 c of thescrew 5, retained in the hole 6 a of thecorresponding bush 6. The diameter of the hole 6 a is larger than the outer diameter of the non-rolled portion 5 b of thescrew 5 but smaller than the outer diameter of each of the rolledportion 5 a and thehead portion 5 c. Therefore, thecasing lid 1 can retain thescrew 5 without thescrew 5 falling off from thebush 6. Thebush 6 is formed of, for example, an aluminum alloy having a lower hardness than thescrew 5 formed of iron. Therefore, the rolledportion 5 a of thescrew 5 can be screwed so as to be inserted through thebush 6 while tapping thebush 6. Accordingly, thebush 6 can be held between the rolledportion 5 a and thehead portion 5 c , of the screw, which each have an outer diameter larger than the diameter of the hole 6 a. - As shown in
FIG. 7 , thecasing 2 is provided withinternal thread portions 2 b in each of which thecorresponding screw 5 is fastened. Thecasing 2 is, at a portion thereof contiguous with eachinternal thread portion 2 b, provided with acounterbore 2 c to which the rolledportion 5 a is fitted. The rolledportion 5 a of thescrew 5 is formed such that the length thereof is smaller than the total of the height of theside surface portion 6 c of thebush 6 and the depth of thecounterbore 2 c. Therefore, thecasing lid 1 can be temporarily fixed to thecasing 2 without thecasing lid 1 being tilted relative to thecasing 2, before thescrew 5 and theinternal thread portion 2 b are fastened to each other. Accordingly, thescrew 5 can be fastened without supporting thecasing lid 1 with a hand in a state where thescrew 5 is retained. Thus, workability is improved, and the time for assembling work can be shortened. - As shown in
FIG. 4 , thecasing lid 1 includes theinterlock connector 8 to be engaged with an interlock female connector 9 (shown inFIG. 2 ) provided in the surfaceseal opening portion 7 b. Theinterlock connector 8 includesterminals 8 b provided in theinterlock connector 8, and ahousing portion 8 a enclosing theterminals 8 b. Thehousing portion 8 a is formed by resin molding so as to be integrated with thecasing lid 1. Theterminals 8 b are insert-molded into thecasing lid 1. Presence or absence of thecasing lid 1 can be determined by detecting connection between theterminals 8 b and terminals provided to the interlock female connector 9. Since thehousing portion 8 a is integrated with thecasing lid 1, the number of components can be reduced. However, the configuration of theinterlock connector 8 is not limited to this configuration. For example, a separately formedinterlock connector 8 may be engaged with a nut that is insert-molded into thecasing lid 1. - Since the
casing lid 1 is formed by resin molding, the weight of thecasing lid 1 can be reduced. However, the method for forming thecasing lid 1 is not limited to resin molding. For example, thecasing lid 1 may be formed by metal sheet press working or aluminum die-casting. If thecasing lid 1 is formed by metal sheet press working, thecasing lid 1 can be formed at low cost. In addition, the shape of eachbush 6 can be simultaneously formed on thecasing lid 1 during metal sheet press working, and thus the number of components can be reduced. Meanwhile, if thecasing lid 1 is formed by aluminum die-casting, the strength of the material can be increased, and the weight of thecasing lid 1 can be reduced. In addition, the shape of thebush 6 can be simultaneously formed on thecasing lid 1 during aluminum die-casting, and thus the number of components can be reduced. - Since each
bush 6 is formed by metal sheet deep drawing, a structure for retaining thescrew 5 can be easily formed at low cost. However, the method for forming thebush 6 is not limited to metal sheet deep drawing. For example, thebush 6 may be formed by machining or forging. If thebush 6 is formed by machining, a material that cannot be formed by metal sheet deep drawing can be used for thebush 6. Accordingly, the degree of freedom in materials that can be selected is increased, thereby enabling increase in the strength of the material, weight reduction, or the like. Meanwhile, if thebush 6 is formed by forging, thebush 6 can be formed at low cost. - Since the
bush 6 is made of an aluminum alloy, thebush 6 has high corrosion resistance and does not need to be plated, and the weight thereof can be reduced. However, the raw material of thebush 6 is not limited to aluminum alloy. The raw material of thebush 6 only has to have a hardness lower than the hardness of thescrew 5. - As described above, in the
power conversion device 100 according to the first embodiment, the seals respectively provided along the peripheries of the plurality of openingportions 7 of thecasing 2 are theshaft seal 3 and thesurface seal 4 which are in contact with thecasing lid 1 covering the openingportions 7. Thus, since the different seals are in contact with the onecasing lid 1, workability of assembling thepower conversion device 100 is improved, and downsizing of thepower conversion device 100 can be realized. In addition, in the case where the terminal in the shaftseal opening portion 7 a provided with theshaft seal 3 is theAC load terminal 2 a, the connection work for theAC load terminal 2 a which is a high-current terminal is performed by fastening screws with use of a tool. Accordingly, the shape of the opening portion can be simplified, and theshaft seal 3 can be used as a seal for the opening portion. In addition, in the case where eachscrew 5 for attaching thecasing lid 1 to thecasing 2 is retained by the correspondingbush 6 at the non-rolled portion 5 b between the rolledportion 5 a of thescrew 5 and thehead portion 5 c of thescrew 5, thescrew 5 can be retained by thecasing lid 1 while thescrew 5 is prevented from falling off from thebush 6. In addition, since thescrew 5 is retained by thecasing lid 1, the work of screwing thescrew 5 into the correspondinginternal thread portion 2 b through thecasing lid 1 is not needed, and the workability of assembling thepower conversion device 100 can be improved. In addition, in the case where thescrews 5 are arranged around thesurface seal 4, noscrews 5 are needed around theshaft seal 3, and thus downsizing of thepower conversion device 100 can be realized. In addition, in the case where, for theinternal thread portion 2 b which is formed in thecasing 2 and to which the rolledportion 5 a is to be fastened, thecounterbore 2 c to which the rolledportion 5 a is fitted is provided at the portion contiguous with theinternal thread portion 2 b, thecasing lid 1 can be temporarily fixed to thecasing 2 without thecasing lid 1 being tilted relative to thecasing 2, before thescrew 5 and theinternal thread portion 2 b are fastened to each other. Accordingly, thescrew 5 can be fastened without supporting thecasing lid 1 with a hand in a state where thescrew 5 is retained. Thus, the workability of assembling thepower conversion device 100 is improved, and the time for the assembling work can be shortened. In addition, in the case where thecasing lid 1 includes theinterlock connector 8 to be engaged with the interlock female connector 9 provided in the surfaceseal opening portion 7 b, presence or absence of thecasing lid 1 to be provided to thepower conversion device 100 can be easily determined. In addition, in the case where thehousing portion 8 a of theinterlock connector 8 is formed by resin molding so as to be integrated with thecasing lid 1, the number of components can be reduced, and the workability of assembling thepower conversion device 100 is improved. In addition, in the case where theterminals 8 b of theinterlock connector 8 are insert-molded into thecasing lid 1, the workability of assembling thepower conversion device 100 is improved, and the time for the assembling work can be shortened. - A
power conversion device 100 according to a second embodiment will be described.FIG. 8 is a perspective view of the outer appearance of acasing lid 1, as seen from the back side ofFIG. 3 . Thepower conversion device 100 according to the second embodiment has a configuration in which aprojection 12 is provided in addition to the components of thecasing lid 1 of thepower conversion device 100 described in the first embodiment. - As shown in
FIG. 8 , thecasing lid 1 includes theprojection 12 located, on the side of thecasing lid 1 on which theopening portions 7 are covered, between thecasing lid 1 and the signal wirefemale connector 10 which is the terminal on the surfaceseal opening portion 7 b side on which thesurface seal 4 is provided. Theprojection 12 is formed by resin molding so as to be integrated with thecasing lid 1. The position of theprojection 12 corresponds to the position of the signal wirefemale connector 10 which is to be detached from the signal wire femaleconnector retaining portion 11 in connection work to the outside, and which has not yet been connected to the outside but is retained by the signal wire femaleconnector retaining portion 11. Thecasing 2 includes the signal wirefemale connector 10 retained by the signal wire femaleconnector retaining portion 11 on the surfaceseal opening portion 7 b side before the connection work.FIG. 2 shows the inside of the surfaceseal opening portion 7 b before the connection work, and the signal wirefemale connector 10 is retained by the signal wire femaleconnector retaining portion 11. If the work of attaching thecasing lid 1 is performed in a state where the connection work has not been performed, theprojection 12 and the signal wirefemale connector 10 interfere with each other, and thus thecasing lid 1 cannot be attached to thecasing 2. Whether the connection work between the signal wirefemale connector 10 and the outside has been completed can be determined based on the interference between theprojection 12 and the signal wirefemale connector 10. - As described above, in the
power conversion device 100 according to the second embodiment, thecasing lid 1 includes theprojection 12 at the position, on the side where the openingportions 7 are covered, that corresponds to the position of the signal wirefemale connector 10 which has not yet been connected to the outside. Accordingly, whether the connection work between the signal wirefemale connector 10 and the outside has been completed can be determined based on the interference between theprojection 12 and the signal wirefemale connector 10. Therefore, the connection work can be prevented from being forgotten to be performed. - A
power conversion device 100 according to a third embodiment will be described.FIG. 9 is a perspective view of the outer appearance of acasing lid 1, as seen from the back side ofFIG. 3 .FIG. 10 is a plan view of the outer appearance of a part of thecasing lid 1 from which ashaft seal 3 of thepower conversion device 100 has been removed.FIG. 11 is a perspective view of the outer appearance of theshaft seal 3 of thepower conversion device 100. Thepower conversion device 100 according to the third embodiment has a configuration in whichprotrusions 3 b are provided to theshaft seal 3 in addition to the components of thecasing lid 1 of thepower conversion device 100 described in the second embodiment. - As shown in
FIG. 11 , theshaft seal 3 includes theprotrusions 3 b to be fitted to shaftseal retaining holes 1 e which are holes formed in the shaft seal mounting portion 1 a of thecasing lid 1. Theshaft seal 3 includes fourprotrusions 3 b on aflat surface 3 c thereof that faces thecasing lid 1 when theshaft seal 3 and the shaft seal mounting portion 1 a are fitted to each other. The number ofprotrusions 3 b is not limited thereto. For example, the number ofprotrusions 3 b may be increased. Theprotrusions 3 b are integrated with theshaft seal 3 when theshaft seal 3 is formed. As shown inFIG. 10 , the shaftseal retaining holes 1 e are formed in the base of the shaft seal mounting portion 1 a. The shaftseal retaining holes 1 e are integrally formed in thecasing lid 1 when thecasing lid 1 is formed. As shown inFIG. 9 , theshaft seal 3 is attached to the shaft seal mounting portion la by fitting theprotrusions 3 b and the shaftseal retaining holes 1 e to each other. If the shaftseal retaining holes 1 e and theprotrusions 3 b are fitted to each other in a lightly press-fitted state, theshaft seal 3 can be left on thecasing lid 1 side when thecasing lid 1 is attached to or detached from thecasing 2. Even if the work of attaching or detaching thecasing lid 1 is performed a plurality of times, the work of attaching theshaft seal 3 to the shaft seal mounting portion la does not occur every time of the attaching or detaching work. Thus, the workability of assembling thepower conversion device 100 is improved. - As described above, in the
power conversion device 100 according to the third embodiment, theshaft seal 3 includes theprotrusions 3 b to be fitted to the shaftseal retaining holes 1 e formed in thecasing lid 1. Accordingly, the workability of assembling thepower conversion device 100 is improved, and the time for the assembling work can be shortened. - Although the disclosure is described above in terms of various exemplary embodiments and implementations, it should be understood that the various features, aspects and functionality described in one or more of the individual embodiments are not limited in their applicability to the particular embodiment with which they are described, but instead can be applied, alone or in various combinations to one or more of the embodiments of the disclosure.
- It is therefore understood that numerous modifications which have not been exemplified can be devised without departing from the scope of the specification of the present disclosure. For example, at least one of the constituent components may be modified, added, or eliminated. At least one of the constituent components mentioned in at least one of the preferred embodiments may be selected and combined with the constituent components mentioned in another preferred embodiment.
- 1 casing lid
- 1 a shaft seal mounting portion
- 1 b surface seal mounting portion
- 1 c bush insert molding portion
- 1 e shaft seal retaining hole
- 2 casing
- 2 a AC load terminal
- 2 b internal thread portion
- 2 c counterbore
- 3 shaft seal
- 3 a side surface
- 3 b protrusion
- 3 c flat surface
- 4 surface seal
- 4 a flat surface
- 5 screw
- 5 a rolled portion
- 5 b non-rolled portion
- 5 c head portion
- 6 bush
- 6 a hole
- 6 b level portion
- 6 c side surface portion
- 7 opening portion
- 7 a shaft seal opening portion
- 7 b surface seal opening portion
- 7 c side surface
- 7 d surface seal mounting surface
- 8 interlock connector
- 8 a housing portion
- 8 b terminal
- 9 interlock female connector
- 10 signal wire female connector
- 11 signal wire female connector retaining portion
- 12 projection
- 100 power conversion device
Claims (15)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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JP2019209410A JP6854866B1 (en) | 2019-11-20 | 2019-11-20 | Power converter |
JP2019-209410 | 2019-11-20 | ||
JPJP2019-209410 | 2019-11-20 |
Publications (2)
Publication Number | Publication Date |
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US20210152098A1 true US20210152098A1 (en) | 2021-05-20 |
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US17/026,410 Active 2040-12-04 US11431256B2 (en) | 2019-11-20 | 2020-09-21 | Power conversion device |
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US (1) | US11431256B2 (en) |
JP (1) | JP6854866B1 (en) |
CN (1) | CN112825458A (en) |
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CN114744451A (en) * | 2021-12-28 | 2022-07-12 | 长春捷翼汽车零部件有限公司 | High-voltage interlocking structure for electric vehicle charging seat and charging device |
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GB1097905A (en) * | 1965-06-10 | 1968-01-03 | Homa Eng Ltd | Improvements in furniture and like castors |
CN201608628U (en) * | 2009-12-17 | 2010-10-13 | 江苏艾索新能源股份有限公司 | Water-proof sealed inverter |
JP5655321B2 (en) * | 2010-02-12 | 2015-01-21 | 株式会社デンソー | Power converter |
JP5645081B2 (en) * | 2011-05-10 | 2014-12-24 | 住友電装株式会社 | Automotive electrical equipment seal cover |
JP5692003B2 (en) * | 2011-10-31 | 2015-04-01 | トヨタ自動車株式会社 | Electrical connection structure between inverter and drivetrain with built-in motor |
JP6083294B2 (en) * | 2013-03-28 | 2017-02-22 | 株式会社豊田自動織機 | Electric compressor and manufacturing method thereof |
JP6114135B2 (en) * | 2013-07-30 | 2017-04-12 | 矢崎総業株式会社 | Protective cover structure |
JP6135439B2 (en) * | 2013-10-09 | 2017-05-31 | 株式会社デンソー | Power converter |
AU2015204846B2 (en) * | 2014-01-07 | 2018-10-18 | Catalyst Lifestyle Limited | Waterproof case |
FR3029980B1 (en) * | 2014-12-15 | 2017-01-13 | Snecma | REPAIR SYSTEM FOR A FASTENER EQUIPPING A REACTOR WALL |
JP2016174139A (en) * | 2015-03-17 | 2016-09-29 | 住友電装株式会社 | Seal cover for electric equipment |
CN205415424U (en) * | 2015-12-22 | 2016-08-03 | 中车戚墅堰机车车辆工艺研究所有限公司 | Pressure equipment turbine casing liner side plate cover device floats |
JP2018174037A (en) * | 2017-03-31 | 2018-11-08 | タイコエレクトロニクスジャパン合同会社 | Seal member and electric connector |
CN206682127U (en) * | 2017-04-06 | 2017-11-28 | 超捷紧固系统(上海)股份有限公司 | Plastic end cover does not take off bolt assembly with bushing pine |
JP6796037B2 (en) * | 2017-07-13 | 2020-12-02 | 本田技研工業株式会社 | Drive circuit unit |
JP6838537B2 (en) * | 2017-09-26 | 2021-03-03 | 株式会社デンソー | Power converter |
CN208534947U (en) * | 2018-07-04 | 2019-02-22 | 超捷紧固系统(上海)股份有限公司 | Cover board bearing installation bolt assembly |
-
2019
- 2019-11-20 JP JP2019209410A patent/JP6854866B1/en active Active
-
2020
- 2020-09-21 US US17/026,410 patent/US11431256B2/en active Active
- 2020-10-26 CN CN202011154730.9A patent/CN112825458A/en active Pending
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US11431256B2 (en) | 2022-08-30 |
JP6854866B1 (en) | 2021-04-07 |
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JP2021083232A (en) | 2021-05-27 |
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